Attachment for riveting hammers



J. E. MALZl. ATTACHMENT FOR RIVETING HAMMERS.

APPLICATION FILED MAY 12. I920.

Patented Mar. 28,1922.

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e] E-jlfaizi J. E. MALZI.

ATTACHMENT FOR RIVETING HAMMEHS. APPLICATION FILED MAY 12. 1920.

1,4103696Q Patented Mar. 28, 1922;

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JACOB E, MALZI, OF MIDDLETOWN, PENNSYLVANIA.

. ATTACEMENT FOR RIVETING HAIVLMEIRS.

To'aZZ whom it may concern.-

Be it known that I, JACOB Eb MALZI, a citizen of the United States, residing at Middletown', in thecountyof Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in At-' tachments for Riveting l-Iammers, of which the following is a specification.

This invention vrelates to an improved guard especially adapted 'forruse on riveting hammers' i A principal aim of this invention is to provide a guard for pneumatic riveting hammers which when applied to the forward portions of a pneumatic riveting hammer will effectively prevent sparks and hot metal chips upon leaving'the rivet head being formed, from striking and possibly causing serious injury to the operator. More particularly, the invention herein disclosed is especially adapted for use when forming the head on a rivet underneath or below the pieces-being fastened together. Of course, when forming the head of a rivet on the under side of a. plurality of'metal sheets or the like, the operator must naturally position himself belowthe rivet with the result that sparks and hot scale 'or chips .upon.

leaving the'rivet head strike the 'operators arms, hands and very often scatter in the air to such an extent that sparks'and small hot-chips fly into the eyes.

A further object of the invention is to provide a guard for pneumatic rivetinghammers which may be readily moved rearwardly or out-of the way of the operator ing hammers and which is desirable in use and cheap 'tomanufacture.

Other objects and advantages of the inspecification of LettersPatent. 'Paftfinted Mar, 28, 1922- Application filed May 12, 1920. Serial No. 380,936.

vention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of the improved guard in an operative position on a riveting hammer,

Figure 2 is a similar view of the improved guard, the same being shown in an inoperative position,

Figure --3 is a horizontal section through the improved guard, the view being taken on line 33 of Figure 2,

Figure l is a perspective of the device detached,

Figure 5 is a central vertical longitudinal sectional view through the device.

In the drawings wherein for the purpose of illustration is shown a preferred embodiment of the invention, the numeral 10 generally designates a pneumatic riveting hammer which is inclusive of a barrel 11 having a longitudinally extending b0re'12 within which the usual piston reciprocates for operating va longitudinally movable plunger 13. As illustrated particularly in Figures land 2, the longitudinally 1n0vable plunger 13 is formed with an enlarged head let having a concaved recess within which the head of a rivet 15 is received as the plunger is forced into engagement with the rivet. In this case, the rivet 15 is illustrated as being extended through sheets of metal l6 and 17 though it is obvious that the rivet may be, employed for connecting other elements. lVhile the head of the rivet is being formed the rivet is .held in position by an anchoring member 19.

The improved guard generally designated by the, numeral 20 consists of a cylindrical attaching portion 21 adapted to be slidably arranged about the forward portion of the barrel 11. The cylindrical attaching portion of the guard is preferably of leather or other yieldable material so that the same will snugly engage the barrel of the hammer and will not partake of any great amount of movement as the result of vibration. As ilplurality of transverse openings or ports 29 lustrated in Figure 5, the cylindrical attaching portion 21 is formed from a single length of leather having its end portions overlapped and connected by spaced rivets or fastening devices 22.

Secured to the outer side of the forwardv portion of the attaching sleeve 21 is a cylindrical protector 24.- which is preferably formed from galvanized iron having its end portions overlapped and connected by rivets 26. It will be noted that the forward rivet 22 of the attaching sleeve 21 is also extended throughthe rear plortion of the cylindrical protector at so that the parts are securely connected. additional rivets 28 are alsoextended through theoverlapped portions of the sleeve 21 and protectorQstso that the cylindrical protector is securely. attached to the sleeve. The forward. portion of the cylindrical. protector 24: is provided with a In the use of this device, the attaching,

sleeve 21 is positioned about the forward portion of the barrel 11 so that the cylindrical protector 24: will surround the enlarged head 14 of the plunger and the extended portion ofthe rivet. During the initial hammering of the extended portion of the rivet, sparks and frequently hot chips of metal leave the rivet and possibly strike the operator. This is especially true when upper cutting rivets, that is when employing the pneumatic riveting hammer to form the head on a rivet underneath or below the piece or pieces being fastened together. When driving rivets in this manner the sparks andhot scale or chips which fall strike the operators arms, handsand very often lodge in the eyes of the operator with disastrous results. With the employment of this device the sparks and hot chips are not allowed to strike the operator or leave the immediate vicinity. of the rivet. since the screens 30 and the protector 24 effectively intercept all flyingmatter. hen the head of the rivet is being finished, as illustrated in Figure 2, the sleeve may be slipped rearwardly soas to give the operator an unobstructedi view of the plunger head and the rivet head. However, while the heady is being formed the operator may view the operation through the screens 30. lVhen the nature of.v the work does not necessitate the use of the guard, the same may be either entirely removed or slipped rearwardly on the barrel of the hammer out of the way of the operator.

With reference to the foregoing description taken in connection with the accompanying drawings it will be observed that a guard constructed in accordance with this invention willeffectively protect'the operator against all sparks and chips flying from theaivet during the formation of the head on the same. Also a device constructed in accordancewith this invention may be used without.interferingwith the riveting operation or the rapidity with which the work may be performed.

It.is to be understoodthat the form of the inventionherewith. shown and described is to be taken as a preferred embodiment of the same and that such minor. changes in 0011-, 85 struction and arrangement. of parts may be made .aswill remain within the spirit of the invention and the scope of whatis claimed.

Having thus. described the. invention, whatv is. claimed as. new is:.

1. The combination with a riveting-hammer, of. a.guard comprising an attaching member. constructed toembrace the barrel of f the riveting-hammer, and: a.-. protector. carried. by. the. attaching member and enclosingthe plunger and headflof the hammer. 2. A. guardfor riveting. hammers. comprisingan attachingmember, and a PTO? tector attached to the attaching member and provided with means whereby the riveting operation mayibeviewed.

3. A guard for rivetinghammers comprising a cylindricalattaching member of yieldablematerial, and. a. protector carried by said. attaching, member."

a L A guard for riveting hammers com prising a cylindrical attaching member of.- yieldable material, and. a; protector carried by said. attaching member, said protector being provided.witlrmeans;-Wl1ereby the 110 rivetingoperation may be viewed.

A. guard for riveting-hammers comprising a. cylindrical-attaching member of yieldable material. adapted to-be frictionally. engaged withthe forward portion. of. the 115 barrel of a riveting, hammer, a cylindrical protector carried by said attaching. member and provided with a plurality of openings, and foraminous. members extending over said openings; V 7 c 6. A guardfor pneumatic riveting hammers comprising a; cylindrical attachingv member of'yieldablematerial adapted tobe adjustably. mounted upon. thebarrelofa rivetinghammer, and a. protector connected 125 to said cylindrical barrel and. provided With means whereby the riveting operation may be viewed. 7

7 A guard for pneumatic riveting-ham mers comprising ayieldable attachinganem- 130 secured to the same, said cylindrical pro- 10 tector being provided with a plurality of openings whereby the riveting operation may be viewed, and foraminous members secured to the inner side of said protector and extending over said openings. 15

In testimony whereof I aflix my signature.

JACOB E. MALZI. [Ls] 

